by chiefss » Wed Dec 12, 2012 2:29 pm
In the last 50 years I've disassembled at least 25 old McCoy 35 redheads and NEVER distorted the piston by using a press of some kind to remove the wrist pin from the piston and rod. The only thing holding it in the piston is congealed oil which is easily overcome with a press of some kind. I use a drill press. Have done this on dozens of engine with no problems.
That brings up the question, why remove it in the first place. If it isn't worn as demonstrated by movement there is no reason to take the writ pin out anyway.
I still have 10 or 12 old McCoy red heads in all three sizes.